Ammonium polysulfide

  • Ammonium sulfide
  • Ammonium trisulfide
  • Diammonium trisulfide
Formula
(NH4)2S3
Description
Ruby red liquid with a strong ammonia odor.
Uses
Can be applied directly to soil as a a fertilizer.

Registry Numbers and Inventories.
CAS
12259-92-6
EC (EINECS/ELINCS)
235-512-5
UN (DOT)
2818
Beilstein/Gmelin
193590 (G)
Swiss Giftliste 1
G-7052
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
H8N2S3
Formula mass
132.28
Melting point, °C
0 - 6
Boiling point, °C
38
Vapor pressure, mmHg
314 (21 C)
Density
1.125 - 1.155 g/cm3 (20 C)
Solubility in water
Decomposes

Hazards and Protection.
Storage
Store in well ventilated areas in enclosed containers. Do not store combustibles in the area of storage vessels. Keep away from any sources of heat or flame. Store tote and smaller containers out of direct sunlight at moderate temperatures (<32 C)
E D2B
Protection
Gloves, boots, and chemical suit should be worn to prevent liquid contact. Wash contaminated clothing prior to reuse. Contaminated shoes cannot be cleaned and should be discarded. Chemical goggles and a full face shield.
Respirators
Wear self-contained breathing apparatus, pressure demand, MSHA/NIOSH (approved or equivalent).
Small spills/leaks
Small releases: Confine and absorb small releases on sand, earth or other inert absorbent. Released material may contain residual sulfides. Spray with weak (~5%) hydrogen peroxide to oxidize sulfides. Large releases: Confine area to qualified personnel. Wear proper protective equipment. Shut off release if safe to do so. Dike spill area to prevent runoff into sewers, drains (possible explosive mixtures) or surface waterways (potential aquatic toxicity). Spray product vapors with water spray or mist. Recover as much of the solution as possible. Treat remaining material as a small release (above).
Stability
Stable at normal temperatures and pressures.
Incompatibilities
Strong oxidizers such as nitrates, nitrites or chlorates can cause explosive mixtures if heated to dryness. Acids will cause the release of hydrogen sulfide and ammonia, highly toxic gases. Alkalies will accelerate the evolution of ammonia. Ammonium polysulfide is not compatible with copper, zinc or their alloys (i.e. bronze, brass, galvanized metals, etc.).
Decomposition
Heating this product will initially evolve ammonia. As the pH of the solution decreases more hydrogen sulfide vapors will evolve. Continued heating will also cause oxides of nitrogen to be released.

Fire.
Upper exp. limit, %
44
Lower exp. limit, %
2
Fire fighting
Extinguish using water spray or foam or as appropriate for combustibles involved in fire. Because of the possible presence of toxic gases and the corrosive nature of the product, wear self-contained brequivalent) and full protective gear.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
When heated or diluted ammonia vapors and hydrogen sulfide vapors will evolve. Both of these gases may form explosive mixtures with air. (See Section 5.2) Keep containers/storage vessels in fire area cooled with water spray.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
1
 
 
Reactivity
1
 

Health.
Poison_Class
2
Exposure effects
   Ingestion
Ingestion of product solution will cause irritation and corrosion of the gastrointestinal tract to include nausea, vomiting and diarrhea. Contact with stomach acid will cause highly toxic hydrogen sulfide to evolve.
   Inhalation
nhalation of product vapors (ammonia and hydrogen sulfide) will cause dizziness and unconsciousness possibly resulting in serious falls from elevated positions..
   Skin
Contact with product mist or solution will cause skin irritation and may result in corrosion of the skin.
   Eyes
Contact with the eyes by product mist or solution will cause irritation and a burning sensation. Eye contact may result in severe corneal injury.

First aid
 
   Ingestion
DO NOT INDUCE VOMITING. If victim is conscious, immediately give large quantities of water. If vomiting does occur, continue to give fluids. Obtain immediate medical attention.
   Inhalation
Remove victim from contaminated atmosphere. If breathing is labored, administer oxygen. If breathing has ceased, clear airway and start mouth to mouth resuscitation. If heart has stopped beating, external heart massage should be applied. Obtain immediate medical attention.
   Skin
Immediately flush with large quantities of water. Remove contaminated clothing under a safety shower. Obtain immediate medical attention.
   Eyes
Immediately flush with large quantities of water for 15 minutes. Hold eyelids apart during irrigation to insure thorough flushing of the entire area of the eye and lids. Obtain immediate medical attention.

Transport.
UN number
2818
Response guide
Hazard class
6.1
Packing Group
III